Those would work. Just some silicone would work. Nice and simple and fast. Shoot a big glob in the hole and press the tin cap on top. On my bus, I laid down some of that blue foam insulation. I think I did 3/4" thick if I remember right but my ceiling was pretty tall. I then screwed some 7/16" thick OSB sheeting on top of that through the foam and into the metal with self tapping screws. Worked great.

Dello, everyone! Long time, no post!
Proud to report that this long weekend was most productive in the skoolie arena, and I'm taking today to spend some time with the little one, who is now napping on daddy

First, I have finally plugged the holes on the floor; it's still a little sticky, but it had a full week to dry before I put the other layers on.

Once I finished with the floor, and since I've had the new market lights unused for quite some time now, I started working on the "forehead". To note, the original plan was to continue prepping the outside for primer, but....it has been raining all weekend, I should say thunderstorming, really...and since I don't need 1.2GW to travel in time, I figured I'll do that another day.

Scrapping metal from the bus, I made this:uploadfromtaptalk1441650619405.jpg
That's a 32" x 2" plate (its in 2 pieces because the sheet I had wasn't long enough) that will support the 3 marker lights on the "forehead". The old ones were crappy, and off center, were driving me nuts. New surface, some bondo, sanding, priming. I have faith!

The miss and I got very excited Saturday, as we were able to visualize couch, fridge (bought a mini one from a friend!!!) bathroom area, bed....
I was thinking about a stand alone/floor a/c to avoid cutting the walls, but the small unit we measured yesterday would fit great in one of the smaller back windows!

Next, I'm getting tired or getting black dirty with every surface I touch inside: power wash the inside!!!